Boko Haram

Boko Haram is a Salafist terrorist group based in northeastern Nigeria that was formed in 2002. In July 2009, the group launched a violent uprising under Mohammed Yusuf, and Yusuf was summarily executed by police; its next leader Abubakar Shekau launched several terrorist attacks against cities in northern Nigeria, using suicide bombers for most attacks. By 2015, it was the deadliest terrorist group, having killed 20,000 people and displaced 2,300,000 people, and Boko Haram aligned itself with the Islamic State in 2014 after previously being liked to al-Qaeda. Boko Haram's kidnapping of schoolgirls from Chibok, their persistent suicide bombings, and their slavery led to other countries such as Cameroon, Chad, and Niger intervening in the war, and Boko Haram launched terrorist attacks against those countries as well.